Small glands adjacent to the terminals of the vas deferens that secrete an alkaline fluid (conductive to sperm motility) that constitutes the greatest portion of the volume of seminal fluid released during ejaculation.

Prostate Gland

A gland located at the base of the bladder that produces about 30% of the seminal fluid released during ejaculation.

Cowper's Glands

Two pea-sized glands located alongside the base of the urethra in the male that secrete an alkaline fluid during sexual arousal.

Ejaculatory Duct

Two short ducts located within the prostate gland.

What structure provides that major portion of the seminal fluid in semen.

Seminal Vesicals

Smegma

A cheesy substance of glandular secretions and skin cells that sometimes accumulates under the foreskin of the penis or hood of the clitorus.

Urology

The medical specialty dealing with reproductive health and genital diseases of the male and urinary tract diseases in both sexes.

Typical range for the number of sperm found in the semen of a single ejaculation

200-500 Million

Average volume of seminal fluid produced by a man as a result of ejaculation

Roughly 1 teaspoon on average

What is the physiologic process that causes an erection?

When a male becomes sexually excited, the nervous system sends out messages that cause expansion of the arteries leading to the 3 erectile cylinders (cavernous bodies-2, 1 spongy body) in the penis. As a result, the rate of blood flow into these parallel cylinders increases rapidly. Because blood flowing out of the penis through veins cannot keep up with the inflow, it accumulat3es in the spongelike tissues of the erectile cylinders, causing erection. The penis remains erect until the messages from the nervous system stop and the inflow of blood returns to normal.

2 Stages of Ejaculation

1. Emission phase2. Expulsion Phase

Emisson Phase

The first stage of male orgasm (ejaculation), in which the semnial fluid is gathered in the uretheral bulb.

Expulsion Phase

The second stage of male orgasm (ejaculation), during which the semen is expelled from the penis by muscular contractions.

1. the foreskin could serve some important function yet to be determined.2. some investigators have expressed concern that sexual function may be altered by excising the foreskin3. traumatic for a newborn and invites possible surgical complications.

age group that has the highest incidence of penile cancer.

over the age of 50

age group that has the highest incidence of testicular cancer.

20 to 35

condition that occurs in 50% of men aged 50-70 and causes problems with urine flow.